CN112993535A - Capsule-based MIMO antenna - Google Patents
Capsule-based MIMO antenna Download PDFInfo
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- CN112993535A CN112993535A CN202110543448.8A CN202110543448A CN112993535A CN 112993535 A CN112993535 A CN 112993535A CN 202110543448 A CN202110543448 A CN 202110543448A CN 112993535 A CN112993535 A CN 112993535A
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- capsule
- silver paste
- film
- mimo antenna
- based mimo
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/27—Adaptation for use in or on movable bodies
- H01Q1/273—Adaptation for carrying or wearing by persons or animals
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/36—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith
- H01Q1/38—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith formed by a conductive layer on an insulating support
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/50—Structural association of antennas with earthing switches, lead-in devices or lightning protectors
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/52—Means for reducing coupling between antennas; Means for reducing coupling between an antenna and another structure
- H01Q1/521—Means for reducing coupling between antennas; Means for reducing coupling between an antenna and another structure reducing the coupling between adjacent antennas
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Abstract
The invention relates to the field of capsule antennas and discloses a capsule-based MIMO antenna. The capsule-based MIMO antenna includes: the device comprises a ceramic component, a silver paste radiation film, a first silver paste feed film, a second silver paste feed film, a first signal lead and a second signal lead; the ceramic component is in a table body shape, the bottom surface of the table body is the same as the cross section of the table body in shape and size, the bottom surface and the cross section are in a central symmetry shape which is formed by cutting a round shape through a square shape, and the central symmetry shape is provided with four cutting edges; the silver paste radiation film is square, and the silver paste radiation film is superposed with the symmetry center of the cross section and is installed on the ceramic component; first silver thick liquid feed film with second silver thick liquid feed film installs on four adjacent both sides of cutting edge in the ceramic subassembly, first signal pin connection first silver thick liquid feed film, second signal pin connection second silver thick liquid feed film.
Description
Technical Field
The invention relates to the field of capsule antennas and discloses a capsule-based MIMO antenna.
Background
Conventional endoscopic systems are wired devices that are connected by flexible cables and extend through the mouth into the body. The subsequent improvement is the capsule antenna of the wireless endoscopic system, in the wireless capsule endoscopic system, the antenna mainly functions to transmit the data collected by the image sensor in the alimentary canal of the human body to a receiving device outside the body in the form of electromagnetic waves. Because of the requirements for diagnostic performance, the resolution and frame rate of the image sensor need to be improved, and therefore, the use of a single antenna is not capable of meeting the increasing data, so that there is an urgent need for a way to improve the throughput data to meet the improvement of diagnostic performance, and the MIMO technology can improve the data throughput by times and is increasingly used in wireless endoscopic systems.
However, the MIMO technology adopts two antennas, the volume of the traditional single antenna is large, when the MIMO technology is adopted, the two antennas are also one antenna at each of two ends of the capsule, so that the distance between the antennas is short, the isolation degree is poor, the traditional antennas basically adopt a spiral and winding mode to increase the electrical length of the antennas, but the adoption of the modes can cause the reduction of the antenna efficiency in different degrees. Therefore, there is a need for a new antenna technology to reduce the antenna volume of wireless capsule endoscopes and overcome the high isolation.
Disclosure of Invention
The invention mainly aims to solve the technical problems of overlarge antenna volume and small isolation degree in the conventional wireless capsule technology.
The present invention provides in a first aspect a capsule-based MIMO antenna comprising:
the device comprises a ceramic component, a silver paste radiation film, a first silver paste feed film, a second silver paste feed film, a first signal lead and a second signal lead;
the ceramic component is in a table body shape, the bottom surface of the table body is the same as the cross section in shape and size, the bottom surface and the cross section are in a central symmetry shape formed by cutting a round shape through a square, and the central symmetry shape is provided with four cutting edges;
the silver paste radiation film is square, and the silver paste radiation film is superposed with the symmetry center of the cross section and is installed on the ceramic component;
first silver thick liquid feed film with second silver thick liquid feed film installs on four adjacent both sides of cutting edge in the ceramic subassembly, first signal pin connection first silver thick liquid feed film, second signal pin connection second silver thick liquid feed film.
Optionally, in a first implementation manner of the first aspect of the present invention, the ceramic component is made of a ceramic material having a dielectric constant in a range of 60 to 70.
Optionally, in a second implementation manner of the first aspect of the present invention, the ceramic material used for the ceramic component includes:
BaLa4Ti4O15、Li1+x-yNb1-x-3yTix+4yO7、Ba2-xSm4+2/3xTi9O24、Ba4.5Sm9Ti18O54、（Pb，Ca）（Zr，Ti）O3。
optionally, in a third implementation manner of the first aspect of the present invention, the range of the height of the stage body is:
35mm~1mm。
optionally, in a fourth implementation manner of the first aspect of the present invention, one end of the first signal lead is connected to the capsule main board, and one end of the second signal lead is connected to the capsule main board.
Optionally, in a fifth implementation form of the first aspect of the present invention, the circular diameter of the central symmetry shape is smaller than the diameter of the capsule.
Optionally, in a sixth implementation manner of the first aspect of the present invention, the first silver paste feed film and the second silver paste feed film are attached to the ceramic component by silver paste brushing and sintering.
Optionally, in a seventh implementation manner of the first aspect of the present invention, the first signal lead is soldered on the first silver paste feed film, and the second signal lead is soldered on the second silver paste feed film.
Optionally, in an eighth implementation manner of the first aspect of the present invention, the materials used for the first signal lead and the second signal lead include: and (4) enameled wires.
Optionally, in a ninth implementation manner of the first aspect of the present invention, four sides of the silver paste radiation film are sequentially parallel to the four truncated sides.
According to the embodiment of the invention, the volume of the antenna is reduced by adopting the ceramic powder with high dielectric constant, the orthogonal dual-polarized antenna is manufactured in a double-side feeding mode, the volume of the antenna is only the size of the volume of the traditional antenna, but two antennas can be obtained, and the isolation of the antenna can be up to more than 20dB due to the adoption of the orthogonal dual-polarized mode.
Drawings
Fig. 1 is a schematic diagram of an overall structure of a capsule-based MIMO antenna in an embodiment of the present invention;
fig. 2 is a top view of a capsule-based MIMO antenna in an embodiment of the present invention.
Detailed Description
The embodiment of the invention provides a capsule-based MIMO antenna.
The terms "first," "second," "third," "fourth," and the like in the description and in the claims, as well as in the drawings, if any, are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It will be appreciated that the data so used may be interchanged under appropriate circumstances such that the embodiments described herein may be practiced otherwise than as specifically illustrated or described herein. Furthermore, the terms "comprises," "comprising," or "having," and any variations thereof, are intended to cover non-exclusive inclusions, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
As shown in fig. 1, the overall structure of the MIMO antenna is schematically illustrated, and the capsule-based MIMO antenna includes:
a ceramic component 101, a silver paste radiation film 102, a first silver paste feed film 103, a second silver paste feed film 105, a first signal lead 104, and a second signal lead 106;
the ceramic component 101 is a table body, the bottom surface of the table body is the same as the cross section in shape and size, the bottom surface and the cross section are centrosymmetric by cutting a circle through a square, and the centrosymmetric is provided with four cutting edges;
the silver paste radiation film 102 is square, and the silver paste radiation film 102 is overlapped with the symmetry center of the cross section and is installed on the ceramic component 101;
first silver thick liquid feed film 103 with second silver thick liquid feed film 105 is installed on the adjacent both sides of four cutting edges in ceramic subassembly 101, first signal lead 104 is connected first silver thick liquid feed film 103, second signal lead 106 is connected second silver thick liquid feed film 105. The silver paste radiation film 102 is baked and attached to the ceramic component 101 again at the ceramic component 101 by silver paste brushing, so that the adhesive force is high, and the silver paste radiation film is not easy to fall off. First silver thick liquid feed film 103 and second silver thick liquid feed film 105 adopt silver thick liquid brush at ceramic subassembly 101 resintering and adhere to on ceramic subassembly 101, and first silver thick liquid feed film 103 and second silver thick liquid feed film 105 account for adjacent both sides in four cutedges, and this can form the MIMO antenna of quadrature dual polarization. The antenna feed adopts the coupling feed mode, adjusts impedance through first silver thick liquid feed film 103 and second silver thick liquid feed film 105 and the distance of day silver thick liquid radiating film 102, can place in different environment in addition by the antenna, through the size of silver thick liquid radiating film 102, adjusts out corresponding frequency. The first signal lead 104 is soldered on the first silver paste feed film 103, and the second signal lead 106 is soldered on the second silver paste feed film 105. The materials used for the first signal lead 104 and the second signal lead 106 include: and (4) enameled wires.
In particular, in one implementation, the ceramic component 101 employs a ceramic material having a dielectric constant in the range of 60-70.
Further, in one embodiment, the ceramic component 101 is made of a ceramic material comprising:
BaLa4Ti4O15、Li1+x-yNb1-x-3yTix+4yO7、Ba2-xSm4+2/3xTi9O24、Ba4.5Sm9Ti18O54、（Pb，Ca）（Zr，Ti）O3. Here, it can be noted that BaLa4Ti4O15Has a dielectric constant of 60, Li1+x-yNb1-x-3yTix+4yO7Has a dielectric constant of 61, Ba2-xSm4+2/3xTi9O24Has a dielectric constant of 63, Ba4.5Sm9Ti18O54Has a dielectric constant of 65, (Pb, Ca) (Zr, Ti) O3The dielectric constant of 67 is ceramic material satisfying the dielectric constant range of 60-70, the traditional antenna basically adopts the mode of spiral and winding to increase the electrical length of the antenna, but the adoption of the mode can cause the reduction of the antenna efficiency in different degrees, the adoption of the ceramic does not need to be realized through the winding mode, the electrical length is reduced by high dielectric constant, and the tangent loss value of the material with high dielectric constant can be reduced to be below 0.003. High isolation, the traditional antenna can only realize isolation by the distance of the antenna due to the limitation of the capsule volume, but the isolation can be adjusted to be more than 20dB by adopting the dual-polarized ceramic form. The traditional antenna is placed at two places of a capsule, the isolation degree is relatively poor and is only about 10dB, and the data throughput rate is greatly influenced.
In one embodiment, the height of the table body ranges from 35mm to 1mm, and the height of the antenna can be adjusted randomly according to the requirement of the capsule, so that the thinnest effect is 1 mm.
In one embodiment, one end of the first signal lead 104 is connected to the main capsule board, and one end of the second signal lead 106 is connected to the main capsule board. The first signal lead 104 and the second signal lead 106 are used to derive information received by the antenna.
As shown in the bottom view of the MIMO antenna in fig. 2, in one embodiment, the diameter of the central symmetrical circle is smaller than the diameter of the capsule, and four sides of the silver paste radiating film 102 are sequentially parallel to the four truncated edges, specifically, a side 1021 of the silver paste radiating film is parallel to the truncated edge 1011, a side 1022 of the silver paste radiating film is parallel to the truncated edge 1012, a side 1023 of the silver paste radiating film is parallel to the truncated edge 1013, and a side 1024 of the silver paste radiating film is parallel to the truncated edge 1014.
According to the embodiment of the invention, the volume of the antenna is reduced by adopting the ceramic powder with high dielectric constant, the orthogonal dual-polarized antenna is manufactured in a double-side feeding mode, the volume of the antenna is only the size of the volume of the traditional antenna, but two antennas can be obtained, and the isolation of the antenna can be up to more than 20dB due to the adoption of the orthogonal dual-polarized mode.
The examples are given solely for the purpose of illustrating the invention and are not to be construed as limiting thereof; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (10)
1. A capsule based MIMO antenna, comprising:
the device comprises a ceramic component, a silver paste radiation film, a first silver paste feed film, a second silver paste feed film, a first signal lead and a second signal lead;
the ceramic component is in a table body shape, the bottom surface of the table body is the same as the cross section of the table body in shape and size, the bottom surface and the cross section are in a central symmetry shape which is formed by cutting a round shape through a square shape, and the central symmetry shape is provided with four cutting edges;
the silver paste radiation film is square, and the silver paste radiation film is superposed with the symmetry center of the cross section and is installed on the ceramic component;
first silver thick liquid feed film with second silver thick liquid feed film installs on four adjacent both sides of cutting edge in the ceramic subassembly, first signal pin connection first silver thick liquid feed film, second signal pin connection second silver thick liquid feed film.
2. The capsule-based MIMO antenna of claim 1, wherein the ceramic assembly is a ceramic material having a dielectric constant in the range of 60-70.
3. The capsule-based MIMO antenna of claim 2, wherein the ceramic material employed by the ceramic assembly comprises:
BaLa4Ti4O15、Li1+x-yNb1-x-3yTix+4yO7、Ba2-xSm4+2/3xTi9O24、Ba4.5Sm9Ti18O54、（Pb，Ca）（Zr，Ti）O3。
4. the capsule-based MIMO antenna of claim 1, wherein the stage has a height in a range of 35mm to 1 mm.
5. The capsule-based MIMO antenna of claim 1, wherein one end of the first signal lead is connected to a capsule main board, and one end of the second signal lead is connected to the capsule main board.
6. The capsule-based MIMO antenna of claim 1, wherein the circular diameter of the central symmetry is smaller than the diameter of the capsule.
7. The capsule-based MIMO antenna of claim 1, wherein the first and second silver paste feed films are brushed and sintered with a silver paste onto the ceramic assembly.
8. The capsule-based MIMO antenna of claim 1, wherein the first signal lead is soldered on the first silver paste feed film and the second signal lead is soldered on the second silver paste feed film.
9. The capsule-based MIMO antenna of claim 1, wherein the materials used for the first and second signal leads comprise: and (4) enameled wires.
10. The capsule-based MIMO antenna of claim 1, wherein four sides of the silver paste radiation film are sequentially parallel to the four truncated sides.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110543448.8A CN112993535A (en) | 2021-05-19 | 2021-05-19 | Capsule-based MIMO antenna |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110543448.8A CN112993535A (en) | 2021-05-19 | 2021-05-19 | Capsule-based MIMO antenna |
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| Publication Number | Publication Date |
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| CN112993535A true CN112993535A (en) | 2021-06-18 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110543448.8A Pending CN112993535A (en) | 2021-05-19 | 2021-05-19 | Capsule-based MIMO antenna |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106159436A (en) * | 2015-04-24 | 2016-11-23 | 桂林嘉威信息技术有限公司 | A kind of miniaturization dual polarized antenna being applicable to WLAN and preparation method thereof |
| CN109193141A (en) * | 2018-08-31 | 2019-01-11 | 天津大学 | A kind of miniaturization telemetering antenna applied to military equipment |
| CN110676576A (en) * | 2019-10-09 | 2020-01-10 | 深圳锐越微技术有限公司 | Dual-polarized microstrip antenna |
-
2021
- 2021-05-19 CN CN202110543448.8A patent/CN112993535A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106159436A (en) * | 2015-04-24 | 2016-11-23 | 桂林嘉威信息技术有限公司 | A kind of miniaturization dual polarized antenna being applicable to WLAN and preparation method thereof |
| CN109193141A (en) * | 2018-08-31 | 2019-01-11 | 天津大学 | A kind of miniaturization telemetering antenna applied to military equipment |
| CN110676576A (en) * | 2019-10-09 | 2020-01-10 | 深圳锐越微技术有限公司 | Dual-polarized microstrip antenna |
Non-Patent Citations (2)
| Title |
|---|
| JONG JIN BAEK等: "Camera- Integrable Wide-Bandwidth Antenna for Capsule Endoscope", 《MDPI》 * |
| WEN LEI等: "Design of a Dual-Polarized Wideband Conformal Loop Antenna for Capsule Endoscopy Systems", 《IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION》 * |
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Application publication date: 20210618 |